postgres

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Robert Haas 4bbf6edfbd postgres_fdw: Avoid 'outer pathkeys do not match mergeclauses' error. When pushing down a join to a foreign server, postgres_fdw constructs an alternative plan to be used for any EvalPlanQual rechecks that prove to be necessary. This plan is stored as the outer subplan of the Foreign Scan implementing the pushed-down join. Previously, this alternative plan could have a different nominal sort ordering than its parent, which seemed OK since there will only be one tuple per base table anyway in the case of an EvalPlanQual recheck. Actually, though, it caused a problem if that path was used as a building block for the EvalPlanQual recheck plan of a higher-level foreign join, because we could end up with a merge join one of whose inputs was not labelled with the correct sort order. Repair by injecting an extra Sort node into the EvalPlanQual recheck plan whenever it would otherwise fail to be sorted at least as well as its parent Foreign Scan. Report by Jeff Janes. Patch by me, reviewed by Tom Lane, who also provided the test case and comment text. Discussion: http://postgr.es/m/CAMkU=1y2G8VOVBHv3iXU2TMAj7-RyBFFW1uhkr5sm9LQ2=X35g@mail.gmail.com		8 years ago
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expected	postgres_fdw: Avoid 'outer pathkeys do not match mergeclauses' error.	8 years ago
sql	postgres_fdw: Avoid 'outer pathkeys do not match mergeclauses' error.	8 years ago
.gitignore	…
Makefile	Allow postgres_fdw to ship extension funcs/operators for remote execution.	10 years ago
connection.c	Update copyright for 2018	8 years ago
deparse.c	Fix postgres_fdw to cope with duplicate GROUP BY entries.	8 years ago
option.c	Update copyright for 2018	8 years ago
postgres_fdw--1.0.sql	…
postgres_fdw.c	postgres_fdw: Avoid 'outer pathkeys do not match mergeclauses' error.	8 years ago
postgres_fdw.control	…
postgres_fdw.h	Update copyright for 2018	8 years ago
shippable.c	Update copyright for 2018	8 years ago